package com.child.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

public class AuthFilter implements Filter {

	@Override
	public void destroy() {
		
	}

	@Override
	public void doFilter(ServletRequest request, ServletResponse response,
			FilterChain chain) throws IOException, ServletException {
		HttpServletRequest req = (HttpServletRequest)request;
		HttpServletResponse resp = (HttpServletResponse)response;
		HttpSession session = req.getSession(false);
		String currentURL = req.getRequestURI();
		String targetURL = currentURL.substring(currentURL.indexOf("/", 1), currentURL.length());
		if(!"/login.jsp".equals(targetURL)){
			if(session==null||session.getAttribute("user")==null){
				resp.sendRedirect(req.getContextPath()+"/login.jsp");
				return;
			}
		}
		chain.doFilter(request, response);
	}

	@Override
	public void init(FilterConfig arg0) throws ServletException {
		
	}
	
	

}
